Manufacture of brake drums



March 17, 1931. A. Y. DODGE 1,796,335

MANUFACTURE OF BRAKE DRUMS Filed Dec. 3,1928

' INVENTOR.

ADIEL Y. DODGE EYS.

Patented Mar. 17, 1931 ADIEL Y. nonsn, or sourrr BEND, INDIANA,

or sou'rrr BEND, INDIANA, A

ASSIGNOR 'I'O IBENDIX BRAKE COMPANY,

CORPORATION OF ILLINOIS MANUFACTURE OF BRAKE DRUMS Application filed December 3, 1928. Serial No. 323,228.

This invention relates to the manufacture of brake drums, {and is illustrated as carried out in reinforcig the cylindrical braking flange of an automobile brakedrum. Pref- LJ erably this flange is encircled by a reinforcing and then flange In opposlte directions from said center,-

strip of metal, which may have its center spot-Welded or otherwise secured to the flange beprogressively secured to the until its ends arebrought together, the ends then being arc-welded or Otherwise secured together. The rin so formed has an important secondary unction in aiding in the dissipation of heat.

The above and other features of the invention will be apparent from the following description of the illustrative embodiments shown in the accompanying drawing, in which:.

Figure 1 is a side elevation of a reinforced drum;

Figure 2 is a section through the drum, on the line 2-2 of Figure 1;

Figure 3 is an elevation of the reinforcing strip or ring; and

Figure 4 is a partial radial section through drum having a reinforcing strip of modified orm.

In the illustrated forms, the drum 10, of conventional form, has the usual cylindrical braking flange 12,- which flange may if desired be strengthened at its free edge by a radial flange or rib 14.

According to my invention, reinforced, against distortion outward when the brake is applied, by means such as a channel-shaped strip 16 (Figures 1-3), or an L- section strip 18 (Figure 4), of metal. The strip 16 or 18 is preferably first spot-welded at its center to the flange 12, at 20, and is then progressively spot-welded or otherwise secured to the flange both ways from this center, until its ends are brought together. The ends are then permanently secured together, preferably by an arc-we1d 22.

The ring so formed not only reinforces the ldrum, but also serves to help in dissipating eat.

While two illustrative reinforcements have been described in detail, it is not my intenthe flange 12 is tion to limit such descriptio terms of the I claim:

the scope of the invention by n, or otherwise than by the appended claims.

1. That method of reinforcing the cylindrical flange of a brake drum prises welding the center of a strip to said flan which comreinforcing ge, then progressively weldmg the strip to the flange in opposite directions from strlp are brou said center until the ght together,

ends of the and then securing said ends together.

2. That method of reinforcing the cylindrical flange of a brake drum which comprises welding strip to said flange, ing the strip to the the center of a reinforcing then progresslvely Weldflange 1n opposite directions from said center until the ends of the strip are brought together, and then welding said ends together.

In testimony signed my na whereof, I have hereunto ADIEL Y. DODGE. 

